var sel=document.getElementById('selectid');
sel.options[10].setAttribute("selected","selected");

sel.options[10].selected=true;

function  getPageSize(){
	var xScroll, yScroll, pageWidth, pageHeight, windowWidth, windowHeight;
 
	if (window.innerHeight && window.scrollMaxY) {
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else if (document.documentElement && document.documentElement.scrollHeight > document.documentElement.offsetHeight){ // Explorer 6 strict mode
		xScroll = document.documentElement.scrollWidth;
		yScroll = document.documentElement.scrollHeight;
	} else { // Explorer Mac...would also work in Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
 
	if (self.innerHeight) { // all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}
 
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else {
		pageHeight = yScroll;
	}
 
	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}
 
	return [pageWidth,pageHeight,windowWidth,windowHeight];
}

<script type="text/javascript">
	var ps=getPageSize();
	if (ps[1]>ps[3]) {
		alert(">");
	}
</script>

var time_from=new Date(order_from['y'],order_from['m']-1,order_from['d']);
var time_to=new Date(order_to['y'],order_to['m']-1,order_to['d']);
var order_days=Math.floor((time_to.getTime()-time_from.getTime())/(1000*60*60*24));
var getday=new Date();
var vyh=0;
var curday;
for (i=0;i<=order_days;i++) {
	//getday.setDate(time_from.getDate()+i);
	getday.setTime(time_from.getTime()+((1000*3600*24)*i));
	curday=getday.getDay();
	if ((curday==0)||(curday==6)) {
		vyh++;
	}
}
var budn=order_days;
budn=budn-vyh;

var order_from=new Array;
var order_from_y=document.getElementById('calc_from_y');
order_from['y']=order_from_y.options[order_from_y.selectedIndex].value;
var order_from_m=document.getElementById('calc_from_m');
order_from['m']=order_from_m.options[order_from_m.selectedIndex].value;
var order_from_d=document.getElementById('calc_from_d');
order_from['d']=order_from_d.options[order_from_d.selectedIndex].value;
var days_in_month=new Array(31,28,31,30,31,30,31,31,30,31,30,31);
if ((order_from['y']%4==0)&&(order_from['m']==2)){
	days_in_month[1]++;
}
if (order_from_d.length>days_in_month[order_from['m']-1]) {
	order_from_d.length=days_in_month[order_from['m']-1];
}
else {
	for(i=order_from_d.length+1;i<=days_in_month[order_from['m']-1];i++) {
		order_from_d.options[order_from_d.options.length] = new Option(i,i);
	}
}

var time_from=new Date(order_from['y'],order_from['m']-1,order_from['d']);
var time_to=new Date(order_to['y'],order_to['m']-1,order_to['d']);
var order_days=Math.floor((time_to.getTime()-time_from.getTime())/(1000*60*60*24));

function printBlock() {
	$("input").each(function(){
		$(this).attr("value", $(this).val());
	});
	$("select").each(function(){
		var val=$(this).val();
		$("option[value='"+val+"']", this).attr('selected', 'selected');
	});
	var PrintContent=$('#PrintContent').html();
	$('body').addClass('printSelected');
	var Logo='<div class="printLogo"><img src="/templates/images/logo.gif" alt=""/></div>';
	var Contacts='<div class="printPhone"><b>Адрес</b><br/>Телефон</div><div style="clear:both;"></div>';
	$('body').append('<div class="printSelection">'+Logo+Contacts+PrintContent+'</div>');
	var is_chrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
	if (!is_chrome) {
		window.print();
		window.setTimeout(pageCleaner,0);
	}
	else {
		document.onmousemove=window.print();
		window.setTimeout(pageCleaner,1000);
	}
	return false;
}
function pageCleaner() {
	$('body').removeClass('printSelected');
	$('.printSelection').remove();
}