/********************************************************
  Text Resize
  Date:12/Dec/2007
  File: textresize.js 
  Location: /apps/merck/docroot/scripts/
  Author: Hemant Bellani
  Description: FONT SIZER OBJECT FOR TEXT-RESIZING 

***********************************************************/


//BEGIN FONT SIZER

/***********************************************************
	creates the cookie with the currrent font-size values
************************************************************/

function setCookie(name, value, days, path, domain, secure) {
	
	var expires = "";
	if ((typeof days == "number") && (days != -1)) {
		var date = new Date();
		date.setTime(date.getTime() + (days*24*60*60*1000));
		expires = date.toGMTString();
	}
	
	document.cookie = name + "=" + escape(value) +
		((expires) ? "; expires=" + expires : "") +
		((path) ? "; path=" + path : "") +
		((domain) ? "; domain=" + domain : "") +
		((secure) ? "; secure" : "");
}

/*************************************************
	gets the cookie with the font-size values 
**************************************************/

function getCookie(name) {
	
	var nameq = name + "=";
	var c_ar = document.cookie.split(';');
	for (var i=0; i < c_ar.length; i++) {
		var c = c_ar[i];
		while (c.charAt(0)==' ') {
			c = c.substring(1, c.length);
		}
		if (c.indexOf(nameq) == 0) {
			return unescape(c.substring(nameq.length, c.length));
		}
	}
	return null;
}

/*************************************************
	deletes the cookie with the font-size values
**************************************************/

function deleteCookie(name, path, domain) {
	
	if (getCookie(name)) {
		cookie_expiredate = new Date();
		document.cookie = name + "=" +
			((path) ? "; path=" + path : "") +
			((domain) ? "; domain=" + domain : "") +
			"; expires=" + cookie_expiredate.toGMTString();
	}
}

var dw_fontSizerDX = {
	/* setting default values for 
		font-size unit,
		default font-size, 
		max font-size,
		min font size,
		tag-list for font-size adjustment
	*/

    sizeUnit:    "px",
    defaultSize: 12,
    maxSize:     24,
    minSize:     9,
    adjustList: [], 

	
/******************************************************************
	Set Default-values for html elements included for text-resizing
*******************************************************************/
    setDefaults: function(unit, dflt, mn, mx, sels,check, change) {
        this.sizeUnit = unit;       this.defaultSize = dflt;
        this.maxSize = mx;          this.minSize = mn;
		this.check=check;			this.change = change;
        if (sels) this.set(dflt, mn, mx, sels);
    },

/*******************************************************************
	Set font-size values for the tag-List to be included for resizing
*********************************************************************/
    set: function (dflt, mn, mx, sels, chg) { 

		var ln = this.adjustList.length;  
		      
        for (var i=0; sels[i]; i++) {
			
            this.adjustList[ln+i] = [];
            this.adjustList[ln+i]["sel"]  = sels[i];
            this.adjustList[ln+i]["dflt"] = dflt ;
            this.adjustList[ln+i]["min"]   = mn || this.minSize;
            this.adjustList[ln+i]["max"]   = mx || this.maxSize;
            this.adjustList[ln+i]["ratio"] = this.adjustList[ln+i]["dflt"] / this.defaultSize;
			this.adjustList[ln+i]["check"] = 0;
			this.adjustList[ln+i]["change"] = chg;
		}
    },

/***********************************
	init sets up the font-resizing 
************************************/

    init: function(normalSize, minSize, maxSize, tagList, check, change) {


		if ( !document.getElementById || !document.getElementsByTagName ) return;
        var size, sizerEl, i;
		size=normalSize;
       
        size = !isNaN( parseFloat(size) )? parseFloat(size): normalSize;
		
        if ( size > this.maxSize || size < this.minSize ) size = normalSize;
        this.curSize = normalSize;  // create curSize property to use in calculations 
	     sizerEl = document.getElementById('sizer');
		if (sizerEl) sizerEl.style.display = "block";
        // if neither set nor setDefaults populates adjustList, apply sizes to body and td's
        if (this.adjustList && this.adjustList.length == 0) {
			
			this.setDefaults('px', normalSize, minSize, maxSize, tagList,check, change);
		}
        if ( size != this.defaultSize ) {
				
				this.adjust( size - this.defaultSize );
    	}
    },


/*********************************************************************
adjusts the font-size for the html elements included for text-resize:
	- a positive value of n would increase the size of text by n units
	- a negative value of n would increase the size of text by n units
***********************************************************************/
    adjust: function(n) {
		
	
        var viewTextSize = document.getElementById('viewTextSize');
		
        //MAT: MODIFIED
        if (ctaID != -1) clearTimeout(ctaID);
        //MAT: end
        if ( !this.curSize ) return; // set in init
        var alist, size, list, i, j;
        // check against max/minSize
        if ( n > 0 ) {

            if ( this.curSize + n > this.maxSize ) n = this.maxSize - this.curSize;
        } else if ( n < 0 ) {
            
 if ( this.curSize + n < this.minSize )
{
 n = this.minSize - this.curSize;

} 
       }
        if ( n == 0 ) 
{
return;
 }       

           this.curSize += n;

        // loop through adjustList, calculating size, checking max/min
        alist = this.adjustList;
       
		
		for (i=0; alist[i]; i++) {
			
           
			if(n < 0) 
			{
				
				if(this.check==0)
				{
						var avg=(this.minSize+this.curSize)/2;
						size = avg * alist[i]['ratio']; // maintain proportion 
														
				}
				else{
					size = this.curSize * alist[i]['ratio']; // maintain proportion 
					}
			}
			if(n > 0) 
					{
					this.check=this.check+1;

					size = this.curSize * alist[i]['ratio']; // maintain proportion 
					}
			
            size = Math.max(alist[i]['min'], size);
            size = Math.min(alist[i]['max'], size);
		
            list = dw_getElementsBySelector( alist[i]['sel'] );
			
            for (j=0; list[j]; j++) {
				if(alist[i]['change']==0)
				{
					list[j].style.fontSize = '';
		      	}
				else
				{
					list[j].style.fontSize = size + this.sizeUnit;
				}
            }
        }
        
		setCookie( "fontSize", this.curSize, 180, "/" ,"","");
        viewTextSize.style.fontSize = "medium";
        currTextSize = viewTextSize.offsetHeight;

        if (ctaID != -1) checkTextAdjust();
    },

/*********************************************************************
	reset the font-size to default font-size values
***********************************************************************/

    reset: function() {
	
		this.check=0;

		var alist = this.adjustList, list, i, j;
        for (i=0; alist[i]; i++) {
            list = dw_getElementsBySelector( alist[i]['sel'] );
            for (j=0; list[j]; j++) { 
                // Reset adjustList elements to their default size
            list[j].style.fontSize = '';  // restores original font size
            } 
        }
        this.curSize = this.defaultSize;
        
        deleteCookie("fontSize", "/", "");
    }

}

function dw_getElementsBySelector(selector) {
	
   

    if (!document.getElementsByTagName) return [];
    var nodeList = [document], tokens, bits, list, col, els, i, j, k;

    selector = selector.normalize();

    tokens = selector.split(' ');

    for (i=0; tokens[i]; i++) {
        
        if ( tokens[i].indexOf('#') != -1 ) {  // id
          //  alert("resize6");
            bits = tokens[i].split('#'); 

            var el = document.getElementById( bits[1] );
			
			if (!el) return []; 
            if ( bits[0] ) {  // check tag
                if ( el.tagName.toLowerCase() != bits[0].toLowerCase() ) return [];
            }
            for (j=0; nodeList[j]; j++) {  // check containment

                if ( nodeList[j] == document || dw_contained(el, nodeList[j]) ) 
                    nodeList = [el];
                else return [];

            }
            continue; 
        }
        else if ( tokens[i].indexOf('.') != -1 ) {  // class
             //alert("resize7");
            bits = tokens[i].split('.'); col = [];
            for (j=0; nodeList[j]; j++) {
                els = dw_getElementsByClassName( bits[1], bits[0], nodeList[j] );
                for (k=0; els[k]; k++) { col[col.length] = els[k]; }
            }
            nodeList = [];
            for (j=0; col[j]; j++) { nodeList.push(col[j]); }
            continue; 
        }
        else {  // element 
            //alert("resize8");
            els = []; 
            for (j = 0; nodeList[j]; j++) {

                list = nodeList[j].getElementsByTagName(tokens[i]);

                for (k = 0; list[k]; k++) { 
                   
                   els.push(list[k]);
                   

}
            }
            nodeList = els;
        }
    }
	
    return nodeList;
}

function dw_getElementsByClassName(sClass, sTag, oCont) {
//alert("resize5");
	var result = [], list, i;
	var re = new RegExp("\\b" + sClass + "\\b", "i");
	oCont = oCont? oCont: document;
	if (document.getElementsByTagName) {
		if ( !sTag || sTag == "*" ) {
			list = oCont.all ? oCont.all : oCont.getElementsByTagName("*");
		}
		else {
			list = oCont.getElementsByTagName(sTag);
		}
		for (i=0; list[i]; i++) {
			if ( re.test( list[i].className ) ) {
				result.push( list[i] );
			}
		}
	}
	return result;
}

// returns true of oNode is contained by oCont (container)
function dw_contained(oNode, oCont) {
	if (!oNode) {
		return; // in case alt-tab away while hovering (prevent error)
	}
	while ( oNode = oNode.parentNode ) {
		if ( oNode == oCont ) {
			return true;
		}
	}
	return false;
}

if (!Array.prototype.push) {  // ie5.0
	Array.prototype.push =  function() {
		for (var i=0; arguments[i]; i++) {
			this[this.length] = arguments[i];
		}
		return this[this.length-1]; // return last value appended
	}
}

String.prototype.normalize = function() {
	var re = /\s\s+/g;
	return this.trim().replace(re, " ");
}

String.prototype.trim = function() {
	var re = /^\s+|\s+$/;
	return this.replace(re, "");
}

//save to a cookie for page to page
var ctaID = -1;
var vtsStyle = "font-size: medium; visibility: hidden; position: absolute; left: -50px; top: -50px;";
document.write('<DIV ID="viewTextSize" style="'+vtsStyle+'">M</DIV>');


function checkTextAdjust() {
//alert("check");
	var viewTextSize = document.getElementById('viewTextSize');
	if ((viewTextSize.offsetHeight < currTextSize-1) || (viewTextSize.offsetHeight > currTextSize+1)) {
		MM_showHideLayers('sizer', '', 'hide');
		dw_fontSizerDX.reset();
	}
	else {
		ctaID = setTimeout('checkTextAdjust()',1000);	
	}
}


function mouseOverImage(imageId)

{

            var imageObj = document.getElementById(imageId);

            imageObj.style.backgroundPosition ="0px -21px";

}

function mouseOutImage(imageId)

{

            var imageObj = document.getElementById(imageId);

            imageObj.style.backgroundPosition ="0px 0px";

}



//END FONT SIZER