// Global Javascript file for Lancaster

//version:   1.0
//author:    Paul Boag
//email:     paul.boag@headscape.co.uk
//website:   http://www.headscape.co.uk



//Get Element by Class Name from: http://www.robertnyman.com/2005/11/07/the-ultimate-getelementsbyclassname/

function getElementsByClassName(oElm, strTagName, strClassName){
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\-/g, "\\-");
    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
    var oElement;
    for(var i=0; i<arrElements.length; i++){
        oElement = arrElements[i];      
        if(oRegExp.test(oElement.className)){
            arrReturnElements.push(oElement);
        }   
    }
    return (arrReturnElements)
}


//Function for converting title tags on images into caption

function addCaption(xClass) {
	var allImages = getElementsByClassName(document, "img", xClass);
	for ( var i=0; i < allImages.length; i++) {
		var imageCaption = document.createTextNode(allImages[i].title);
		var imageContainer = document.createElement("div");
		var imagePara = document.createElement("p");
		var imageWidth = allImages[i].getAttribute("width");
		var spareSpan = document.createElement("span"); //This adds an extra span. Useful for curved corners
		imagePara.appendChild(imageCaption);
		allImages[i].parentNode.insertBefore(imageContainer, allImages[i]);
		imageContainer.appendChild(allImages[i]);
		if ( allImages[i].title != "" ) {
		imageContainer.appendChild(imagePara); 
		}
		imageContainer.appendChild(spareSpan);		
		imageContainer.className = xClass
		spareSpan.className = "spareSpan"
		allImages[i].className = "imgCaption"
		imageContainer.style.width = imageWidth + "px";
		
    }
}




// Runs all the listed functions on the loading of the window





// Enhanced Table Script

function domTableEnhance()
{
	if(!document.createTextNode){return;}
	var tableClass='enhancedtable';
	var colourClass='enhancedtablecolouredrow';
	var hoverClass='enhancedtablerowhover';
	var activeClass='enhancedtableactive';
	var alltables,bodies,i,j,k,addClass,trs,c,a;
	alltables=document.getElementsByTagName('table');
	for (k=0;k<alltables.length;k++)
	{
		if(!alltables[k].className.match(tableClass)){continue;}
		bodies=alltables[k].getElementsByTagName('tbody');
		for (i=0;i<bodies.length;i++)
		{
			trs=bodies[i].getElementsByTagName('tr')
			for (j=0;j<trs.length;j++)
			{
				if(trs[j].getElementsByTagName('td').length>0)
				{
					addClass=j%2==0?' '+colourClass:'';
					trs[j].className=trs[j].className+addClass;
					trs[j].onclick=function()
					{
						if(this.className.match(activeClass))
						{
							var rep=this.className.match(' '+activeClass)?' '+activeClass:activeClass;
							this.className=this.className.replace(rep,'');
						} else {
							this.className+=this.className?' '+activeClass:activeClass;
						}
					}
					trs[j].onmouseover=function()
					{
						this.className=this.className+' '+hoverClass;
					}
					trs[j].onmouseout=function()
					{
						var rep=this.className.match(' '+hoverClass)?' '+hoverClass:hoverClass;
						this.className=this.className.replace(rep,'');
					}
				}
			}
		}
	}		
} 
/*window.onload=domTableEnhance;*/

window.onload=function(){
addCaption("imgLeft");
addCaption("imgRight");
domTableEnhance();
}