// JavaScript Document

//resizen van het scherm
function resizeScreen() {

	width = document.body.offsetWidth;
	height = document.body.offsetHeight;	
	//alert(width);
	//alert(height);

	document.getElementById('balklinks').style.height = height-60+"px";
	

	var navi = navigator.appVersion;
	if(navi.indexOf("MSIE")>-1){
		//alert("IE");
		document.getElementById('navigatie').style.width = width-285+"px";
		document.getElementById('midden').style.width = width-288+"px";
		document.getElementById('midden').style.height = height-166+"px";
		document.getElementById('bovenaan').style.width = width-285+"px";
	}
	else{
		document.getElementById('navigatie').style.width = width-305+"px";
		document.getElementById('midden').style.width = width-325+"px";		
		document.getElementById('midden').style.height = height-202+"px";
		document.getElementById('bovenaan').style.width = width-305+"px";
		document.getElementById('onderste').style.width = width-45+"px";		
	}

}


//checkt of de velden zijn ingevuld
function check_Form(formulier, fields, description) {
	
	d = document.forms [formulier];
	var errors = "";
	
	for (i=0;i<fields.length;i++){ 
		data_field = fields[i];
		if(d [data_field].length && d [data_field].type!="select-one") { // radio or checkbox and no select?
			array_errors = true;
			for (y=0;y<d [data_field].length;y++) { // get options
				if(d [data_field][y].checked == true) {
					array_errors = false;
				}
			}
			if(array_errors != false){
				errors += "- "+description[i]+"\n";
			}
		}		
		else if(d [data_field].type=="checkbox"){
			if(d [data_field].checked == false){
				errors += "- "+description[i]+"\n";
			}
		}
		else {
			if(d [data_field].value == "") {
				errors += "- "+description[i]+"\n";
			}
		}
	}
	if(errors) {
		alert("De volgende veld(en) zijn nog niet ingevuld:\n"+errors);
		return false;
	}
	else {
		return true;
	}
}