function changeBgColor(id1,id2){
	if(id1=='1'){
		var el=document.getElementById('apImg1_1');
		el.style.backgroundColor='#F2F4E8';
		var el=document.getElementById('apImg1_2');
		el.style.backgroundColor='#F2F4E8';
		var el=document.getElementById('apImg'+id1+'_'+id2);		
		el.style.backgroundColor='#E9ECD9';
	}
	if(id1=='2'){
		var el=document.getElementById('apImg2_1');
		el.style.backgroundColor='#F2F4E8';
		var el=document.getElementById('apImg2_2');
		el.style.backgroundColor='#F2F4E8';
		var el=document.getElementById('apImg2_3');
		el.style.backgroundColor='#F2F4E8';
		var el=document.getElementById('apImg'+id1+'_'+id2);		
		el.style.backgroundColor='#E9ECD9';
	}
}
function getPageHeight(){
        var pageHeight;
        if( window.innerHeight && window.scrollMaxY ){
            // Firefox 
            pageHeight = window.innerHeight + window.scrollMaxY;
        }else if( document.body.scrollHeight > document.body.offsetHeight ){
            // all but Explorer Mac
            pageHeight = document.body.scrollHeight;
        }else{ 
            // works in Explorer 6 Strict, Mozilla (not FF) and Safari
            pageHeight = document.body.offsetHeight + document.body.offsetTop; 
        }
        return pageHeight;
}
function setOpacity(value,el){
    if(navigator.appName=='Microsoft Internet Explorer'){
        el.style.filter = 'alpha(opacity=' + value*10 + ')';
    }else{
        el.style.opacity = value/10;
    }
}
function getScrollPosition() {
    var x = 0;
    var y = 0;
    if( typeof( window.pageYOffset ) == 'number' ) {
        x = window.pageXOffset;
        y = window.pageYOffset;
    } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
        x = document.documentElement.scrollLeft;
        y = document.documentElement.scrollTop;
    } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
        x = document.body.scrollLeft;
        y = document.body.scrollTop;
    }
    var position = {
        'x' : x,
        'y' : y
    }
    return position;
}
function submitForm(formName,elems){
    var els=elems.split(":");
    var s=true;
    if(els.length>=0){
        for(i=0;i<els.length;i++){
            if(document.getElementById(els[i]).value=='')s=false;
        }
    }
    if(s){
        var byName=document.getElementsByName();
        alert(byName[0].value);
        document.getElementsByName(formName)[0].submit();
    }else{
        alert("Unesi obavezna polja!");
    }
}