function MM_validateForm() { //v4.0
  if (document.getElementById){
    var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
    for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
      if (val) { nm=val.name; if ((val=val.value)!="") {
        if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
          if (p<1 || p==(val.length-1)) errors+='- '+nm+' is ongeldig\n';
        } else if (test!='R') { num = parseFloat(val);
          if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
          if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
            min=test.substring(8,p); max=test.substring(p+1);
            if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
      } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is vereist\n'; }
    } if (errors) alert('Gelieve de volgende zaken na te kijken:\n'+errors);
    document.MM_returnValue = (errors == '');
} }


function getBrowserWidth(){
	if (window.innerWidth){
		return window.innerWidth;}	
	else if (document.documentElement && document.documentElement.clientWidth != 0){
		return document.documentElement.clientWidth;	}
	else if (document.body){return document.body.clientWidth;}		
		return 0;
}

function determineStyle(){
	
	var browserWidth = getBrowserWidth();
	var i, a, main;
	
	if (browserWidth <= 1200){
		for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
			if(a.getAttribute("rel").indexOf("style") != -1
			&& a.getAttribute("title")) {
				a.disabled = true;
				if(a.getAttribute("title") == "narrow") a.disabled = false;
			}
		}
	}
	
	if (browserWidth > 1200){
		for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
			if(a.getAttribute("rel").indexOf("style") != -1
			&& a.getAttribute("title")) {
				a.disabled = true;
				if(a.getAttribute("title") == "wide") a.disabled = false;
			}
		}
	}
}



function doOnResize () {
	determineStyle();
}

function doOnLoad () {
	determineStyle();
}