function validateField(a,b,c){var d=eval("document."+a+"."+b);var e=LTrim(d.value);switch(c){case'number':if(!isNaN(d.value)){return true}else{d.focus();return false}break;case'page_num':if(!isNaN(d.value)&&d.value!=""&&d.value>0){return true}else{d.focus();return false}break;case'email':var f=d.value.indexOf("@");var g=d.value.lastIndexOf(".");if((f!=-1)&&(g!=-1)&&(f!=0)&&(f<g)){return true}else{d.focus();return false}break;case'null':if(LTrim(d.value)==""||d.value=="XX"||d.value==" "){d.focus();return false}else{return true}break;case'url':var h=new RegExp("\\b(http)|(https)|(ftp)://www.\\w*","i");if(!d.value.match(h)){d.focus();return false}else{return true}break;default:alert('Please specify key to validate');break}}function LTrim(a){while(a.substring(0,1)==' '){a=a.substring(1,a.length)}return a}