function naarpagina(nr) {
switch(nr) {
case 0: document.getElementById('contentframe').src="main.php?content=welkom"; break;
case 1: document.getElementById('contentframe').src="main.php?content=webdesign"; break;
case 2: document.getElementById('contentframe').src="main.php?content=webhosting"; break;
case 3: document.getElementById('contentframe').src="main.php?content=demensen"; break;
case 4: document.getElementById('contentframe').src="main.php?content=gedanezaken"; break;
case 5: document.getElementById('contentframe').src="main.php?content=contact"; break;
}
}

function adaptResolution() {
if(screen.width<1024) {location.replace("index800.php");}
}

function maximizeWindow() {
	var offset = (navigator.userAgent.indexOf("Mac") != -1 ||
		navigator.userAgent.indexOf("Gecko") != -1 ||
		navigator.appName.indexOf("Netscape") != -1) ? 0 : 4;
	window.moveTo(-offset, -offset);
	window.resizeTo(screen.availWidth + (2 * offset),
		screen.availHeight + (2 * offset));
}


function changecss(theClass,element,value) {
var cssRules;
if (document.all) {
	cssRules = 'rules';
} else if (document.getElementById) {
	cssRules = 'cssRules';
}
var added = false;
for (var S = 0; S < document.styleSheets.length; S++) {
	for (var R = 0; R < document.styleSheets[S][cssRules].length; R++) {
		if (document.styleSheets[S][cssRules][R].selectorText == theClass) {
			if(document.styleSheets[S][cssRules][R].style[element]){
				document.styleSheets[S][cssRules][R].style[element] = value;
				added=true;
				break;
			}
		}
	}
	if(!added) {
		if(document.styleSheets[S].insertRule) {
			document.styleSheets[S].insertRule(theClass+' { '+element+': '+value+'; }',document.styleSheets[S][cssRules].length);
		} else if (document.styleSheets[S].addRule) {
			document.styleSheets[S].addRule(theClass,element+': '+value+';');
		}
	}
}
}

function focusinput(item, area) {
changecss("."+item,"color","#E50000");
if(area) {
	changecss("textarea","background-color","#F3F3F3");
} else {
	changecss("input[name='ws_"+item+"']","background-color","#F3F3F3");
}
}

function outfocusinput(item, area) {
changecss("."+item,"color","#027AC4");
if(area) {
	changecss('textarea',"background-color","transparent");
} else {
	changecss("input[name='ws_"+item+"']","background-color","transparent");
}
}

function maxlengte(elem, lengte) {
if(elem.value.length>lengte) {
	elem.value = elem.value.substring(0, lengte);
}
}

var stretched = false;

function stretch(elem) {
if(!stretched && elem.value.length>27) {
	changecss('textarea',"height","75px");
	stretched = true;
} else if(stretched && elem.value.length<=27) {
	changecss('textarea',"height","25px");
	stretched = false;
}
}