// Removes leading whitespaces
function ltrim( value ) {
	
	var re = /\s*((\S+\s*)*)/;
	return value.replace(re, "$1");
	
}

// Removes ending whitespaces
function rtrim( value ) {
	
	var re = /((\s*\S+)*)\s*/;
	return value.replace(re, "$1");
	
}

// Removes leading and ending whitespaces
function trim( value ) {
	
	return ltrim(rtrim(value));
	
}
function show_reviewpopup(){
	document.getElementById('reviewpopup').style.display='';
}
function hide_reviewpopup(){
	document.getElementById('reviewpopup').style.display='none';
}
<!-- End Reviewpopup------ -->
function show_reviewpopup_1(){
	document.getElementById('reviewpopup_1').style.display='';
}
function hide_reviewpopup_1(){
	document.getElementById('reviewpopup_1').style.display='none';
}
<!-- End Reviewpopup------1 -->

function show_reviewpopup_2(){
	document.getElementById('reviewpopup_2').style.display='';
}

function show_sub_menu(){
	document.getElementById('sub_menu').style.display='';
}
function show_sub_menu1(){
	document.getElementById('sub_menu1').style.display='';
}
function hide_reviewpopup_2(){
	document.getElementById('reviewpopup_2').style.display='none';
}
function hide_sub_menu(){
	document.getElementById('sub_menu').style.display='none';
}
function hide_sub_menu1(){
	document.getElementById('sub_menu1').style.display='none';
}
<!-- End Reviewpopup------2 -->

function show_reviewpopup_3(){
	document.getElementById('reviewpopup_3').style.display='';
}
function hide_reviewpopup_3(){
	document.getElementById('reviewpopup_3').style.display='none';
}
<!-- End Reviewpopup------3 -->

function show_reviewpopup_4(){
	document.getElementById('reviewpopup_4').style.display='';
}
function hide_reviewpopup_4(){
	document.getElementById('reviewpopup_4').style.display='none';
}
<!-- End Reviewpopup------4 -->

<!-- -->
function show_learnmore(){
	document.getElementById('learnmore').style.display='';
}
function hide_learnmore(){
	document.getElementById('learnmore').style.display='none';
}