/*------------------------*/
/*  TREKLAND  SCRIPTS     */
/*------------------------*/



var is = new browserCheck();
function browserCheck(){
	this.agent=navigator.userAgent.toLowerCase()
	this.op=window.opera 
	this.moz=(this.agent.indexOf("gecko")>-1 || window.sidebar)
	this.ie=this.agent.indexOf("msie")>-1 && !this.op
	return this;
}


function updateCartVar()
{

	var prodVelkost = document.getElementById('prodVelkost');
	var prodFarba = document.getElementById('prodFarba');
	var addCartVar = document.getElementById('addCartVar');
	
	if ( prodVelkost && prodFarba && addCartVar ) {
		var result = prodVelkost.value
		if ( '' != prodFarba.value ) {
			result = result + ' ' + prodFarba.value;
		}
		//console.log(result);
		addCartVar.value = result;
	}

}

function setFarbaVariant(val, imgSrc)
{

	var prodFarba = document.getElementById('prodFarba');
	if ( prodFarba ) {
		prodFarba.value = val;
	}
	
	var productImgSpan = document.getElementById('productImg');
	if ( productImgSpan ) {
		productImgSpan.innerHTML = '<img src="' + imgSrc + '" alt=""/>';
	}

}

function init()
{
	setHeight();
}



function setHeight(){

	var bottom;
	var offset = 0;


	bottomLeftColumn =  document.getElementById("left-column-bottom")?document.getElementById("left-column-bottom").offsetTop:0;
	bottomRightColumn =  document.getElementById("right-column-bottom")?document.getElementById("right-column-bottom").offsetTop:0;

	bottom = (bottomLeftColumn>bottomRightColumn)?bottomLeftColumn:bottomRightColumn;

	
	if(document.getElementById("envelope") && bottom>0)
	{
		if(!is.ie)document.getElementById("envelope").style.height = offset+bottom+"px";
	}
	
}