check the value numeric or not.js

  	
		var telephoneWrapper = jQuery(".telephone");
		var invalidMsg = jQuery('<span class="tp-invalid" style="position:relative; color: red;">!+ TEXT page_contact telePhoneInvaliMsg htmlStrip +!</span>').appendTo("form.flexibleForm .section1");
		invalidMsg.hide();
	
	    jQuery(".submit").click(function(){
		var telephone = jQuery("#ff_telephone1").val();
		var intRegex = /^\d+$/;
				if(!intRegex.test(telephone)) {
					telephoneWrapper.addClass("invalid");
					invalidMsg.show();
					telephone='';
					telephone = jQuery("#ff_telephone1").val();
					return false; 
					
				}else{
					telephoneWrapper.removeClass("invalid");
					invalidMsg.hide();
					return true;
				}  
		});