var ferries = ferries || {};
ferries.common = {
/* Event Functions */

// Add an event to the obj given
// event_name refers to the event trigger, without the "on", like click or mouseover
// func_name refers to the function callback when event is triggered
    addEvent: function (obj,event_name,func_name){
	    if (obj.attachEvent){
		    obj.attachEvent("on"+event_name, func_name);
	    }else if(obj.addEventListener){
		    obj.addEventListener(event_name,func_name,true);
	    }else{
		    obj["on"+event_name] = func_name;
	    }
    },

// Removes an event from the object
    removeEvent: function (obj, event_name, func_name) {
	    
		if (obj.detachEvent){
		    obj.detachEvent("on"+event_name,func_name);
	    }else if(obj.removeEventListener){
		    obj.removeEventListener(event_name,func_name,true);
	    }else{
		    obj["on"+event_name] = null;
	    }
		
    },


// Stop an event from bubbling up the event DOM
    stopEvent: function (evt){
	    evt || window.event;
	    if (evt.stopPropagation){
		    evt.stopPropagation();
		    evt.preventDefault();
	    }else if(typeof evt.cancelBubble != "undefined"){
		    evt.cancelBubble = true;
		    evt.returnValue = false;
	    }
	    return false;
    },

// Get the obj that starts the event
    getElement: function (evt){
	    if (window.event){
		    return window.event.srcElement;
	    }else{
		    return evt.currentTarget;
	    }
    },
// Get the obj that triggers off the event
    getTargetElement: function (evt){
	    if (window.event){
		    return window.event.srcElement;
	    }else{
		    return evt.target;
	    }
    },
// For IE only, stops the obj from being selected
    stopSelect: function (obj){
	    if (typeof obj.onselectstart != 'undefined'){
		    addEvent(obj,"selectstart",function(){ return false;});
	    }
    },

/*    Caret Functions     */

// Get the end position of the caret in the object. Note that the obj needs to be in focus first
    getCaretEnd: function (obj){
	    if(typeof obj.selectionEnd != "undefined"){
		    return obj.selectionEnd;
	    }else if(document.selection&&document.selection.createRange){
		    var M=document.selection.createRange();
		    try{
			    var Lp = M.duplicate();
			    Lp.moveToElementText(obj);
		    }catch(e){
			    var Lp=obj.createTextRange();
		    }
		    Lp.setEndPoint("EndToEnd",M);
		    var rb=Lp.text.length;
		    if(rb>obj.value.length){
			    return -1;
		    }
		    return rb;
	    }
    },
// Get the start position of the caret in the object
    getCaretStart: function (obj){
	    if(typeof obj.selectionStart != "undefined"){
		    return obj.selectionStart;
	    }else if(document.selection&&document.selection.createRange){
		    var M=document.selection.createRange();
		    try{
			    var Lp = M.duplicate();
			    Lp.moveToElementText(obj);
		    }catch(e){
			    var Lp=obj.createTextRange();
		    }
		    Lp.setEndPoint("EndToStart",M);
		    var rb=Lp.text.length;
		    if(rb>obj.value.length){
			    return -1;
		    }
		    return rb;
	    }
    },
// sets the caret position to l in the object
    setCaret: function (obj,l){
	    obj.focus();
	    if (obj.setSelectionRange){
		    obj.setSelectionRange(l,l);
	    }else if(obj.createTextRange){
		    m = obj.createTextRange();		
		    m.moveStart('character',l);
		    m.collapse();
		    m.select();
	    }
	},
// sets the caret selection from s to e in the object
    setSelection: function (obj,s,e){
	    obj.focus();
	    if (obj.setSelectionRange){
		    obj.setSelectionRange(s,e);
	    }else if(obj.createTextRange){
		    m = obj.createTextRange();		
		    m.moveStart('character',s);
		    m.moveEnd('character',e);
		    m.select();
	    }
    },
	
	/* Offset position from top of the screen */
	curTop: function (obj){
		toreturn = 0;
		while(obj){
			toreturn += obj.offsetTop;
			obj = obj.offsetParent;
		}
		return toreturn;
	},
	curLeft: function (obj){
		toreturn = 0;
		while(obj){
			toreturn += obj.offsetLeft;
			obj = obj.offsetParent;
		}
		return toreturn;
	},
/* ------ End of Offset function ------- */

/* Types Function */

// is a given input a number?
	isNumber: function (a) {
		return typeof a == 'number' && isFinite(a);
	},

/* Object Functions */

	replaceHTML: function (obj,text){
		while(el = obj.childNodes[0]){
			obj.removeChild(el);
		};
		obj.appendChild(document.createTextNode(text));
	}
};
/*    Escape function   */
String.prototype.addslashes = function(){
	return this.replace(/(["\\\.\|\[\]\^\*\+\?\$\(\)])/g, '\\$1');
}
String.prototype.trim = function () {
    return this.replace(/^\s*(\S*(\s+\S+)*)\s*$/, "$1");
};
/* --- Escape --- */