function popuptoggle(div_id) {
	var el = document.getElementById(div_id);
	if ( el.style.display == 'none' ) {	el.style.display = 'block';}
	else {el.style.display = 'none';}
}

function blanket_size(popUpDivVar) {
	if (typeof window.innerWidth != 'undefined') {
		viewportheight = window.innerHeight;
	} else {
		viewportheight = document.documentElement.clientHeight;
	}

	if ((viewportheight > document.body.parentNode.scrollHeight) && (viewportheight > document.body.parentNode.clientHeight)) {
		blanket_height = viewportheight;
	} else {
		if (document.body.parentNode.clientHeight > document.body.parentNode.scrollHeight) {
			blanket_height = document.body.parentNode.clientHeight;
		} else {
			blanket_height = document.body.parentNode.scrollHeight;
		}
	}

	var blanket = document.getElementById('blanket');
	blanket.style.height = blanket_height + 'px';
	var popUpDiv = document.getElementById(popUpDivVar);
	popUpDiv_height=blanket_height/2-200;
	//150 is half popups height
	popUpDiv.style.top = '200px';
}

function window_pos(popUpDivVar) {
	if (typeof window.innerWidth != 'undefined') {
		viewportwidth = window.innerHeight;
	} else {
		viewportwidth = document.documentElement.clientHeight;
	}
	if ((viewportwidth > document.body.parentNode.scrollWidth) && (viewportwidth > document.body.parentNode.clientWidth)) {
		window_width = viewportwidth;
	} else {
		if (document.body.parentNode.clientWidth > document.body.parentNode.scrollWidth) {
			window_width = document.body.parentNode.clientWidth;
		} else {
			window_width = document.body.parentNode.scrollWidth;
		}
	}

	var popUpDiv = document.getElementById(popUpDivVar);
	window_width=window_width/2-200;
	//150 is half popups width
	popUpDiv.style.left = window_width + 'px';
}

function popup(windowname) {
	blanket_size(windowname);
	window_pos(windowname);
	popuptoggle('blanket');
	popuptoggle(windowname);		
}

function valid()
{
		if(document.getElementById('name1').value=='' || document.getElementById('email1').value==''  || document.getElementById('name1').value=='Name' || document.getElementById('email1').value=='Email')
		{
			alert('Both fields are Required');
			return false;
			}

		var a = document.getElementById('email1').value;
		var filter =  /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
		//if it's valid email
		if(filter.test(a)){
			_gaq.push(['_trackEvent', 'FreeCloudReview', 'Submit', 'AllCloudReviewForms']);
			return true;
		}
		else{
			alert("Type a valid e-mail please !");	
			return false;
		}
	}