function checkMandatory(){	
			var flag = true;
			var message = 'Please fill in all mandatory fields !';
			
			if (document.checkFRM.field20.value.length==0){
			  	flag = false;
			}; 
			
			if (document.checkFRM.field22.value.length==0){
			  	flag = false;
			}; 
			
			if (document.checkFRM.field27.value.length==0){
			  	flag = false;
			}; 
			
			if (document.checkFRM.field23.value.length==0){
			  	flag = false;
			}; 
			
			if (document.checkFRM.field25.value.length==0){
			  	flag = false;
			}; 
			
			var radioBtnChecked = false;
			for (j=0; j<document.checkFRM.field26.length; j++) {
				if (document.checkFRM.field26[j].checked==true){
					radioBtnChecked = true;	
					break;	
					}	
				}	
		
			if (radioBtnChecked==false){
				flag = false;
			}; 
		
			if (flag == false) {
				alert(message);
			};

					
			return flag;

		};