String.prototype.containsString = function(t) { return this.indexOf(t) >= 0 ? true : false; }
String.prototype.beginsWithString = function(t, i) { if (i==false) { return (t == this.substring(0, t.length)); } else { return (t.toLowerCase() == this.substring(0, t.length).toLowerCase()); } }
String.prototype.endsWithString = function(t, i) { if (i==false) { return (t == this.substring(this.length - t.length)); } else { return (t.toLowerCase() == this.substring(this.length - t.length).toLowerCase()); } }
String.prototype.isEmail = function () { var rx = new RegExp("\\w+([-+.\']\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*"); var matches = rx.exec(this); return (matches != null && this == matches[0]); }
String.prototype.isURL = function () { var rx = new RegExp("http(s)?://([\\w-]+\\.)+[\\w-]+(/[\\w-\\+ ./?%:&=#\\[\\]]*)?"); var matches = rx.exec(this); return (matches != null && this == matches[0]); }
String.prototype.trimString = function(){ return this.replace(/^\s+|\s+$/g,''); }
String.prototype.splitrimString = function(t){ return this.trim().split(new RegExp('\\s*'+t+'\\s*')) }
String.prototype.escHtml = function(){ var i,e={'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;'},t=this; for(i in e) t=t.replace(new RegExp(i,'g'),e[i]); return t }
String.prototype.unescHtml = function(){ var i,e={'&lt;':'<','&gt;':'>','&amp;':'&','&quot;':'"'},t=this; for(i in e) t=t.replace(new RegExp(i,'g'),e[i]); return t }
String.prototype.urlEncode = function(){ return encodeURIComponent(this); }