JavaScript common method of sharing

This article to share a few JavaScript commonly used methods, very practical, but also very simple, the need for small partners can refer to.

For now everyone in peacetime development, will write a number of Repetitive JS processing code, today summed up several more commonly used methods to achieve. Gets the GET request parameter, going to the string space.

1. Getting the parameters in GET request

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function Getpara (para) {if (Location.href.indexOf ("?") = = 1) {///No arguments, then does nothing. return null;} else{//Obtain the string following the GET request number var urlquery = Location.href.split ("?"); if (Urlquery[1].indexof ("&") ==-1) {///only one parameter if (urlquery[1].indexof ("=") = = 1) {//No equal sign, no arguments, then do nothing return null ; }else{var keyvalue = urlquery[1].split ("="); var key = keyvalue[0]; var value = keyvalue[1]; if (Key==para) {return value; }}else{//parsing parameter var urlterms = Urlquery[1].split ("&"); for (var i = 0; I <urlterms.length;i++) {var keyvalue = Urlterms[i].split ("="); var key = keyvalue[0]; var value = keyvalue[1]; if (Key==para) {return value;}} } return null; }

2.//This function is used to remove the space left by the string

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function Lefttrim (str) {if (Str.charat (0) = = "") {str = str.slice (1); str = Lefttrim (str); return str; }

3.//This function is used to remove the space to the right of the string

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function Righttrim (str) {if (str.length-1 >= 0 && str.charat (str.length-1) = "") {str = str.slice (0, St R.LENGTH-1); str = Righttrim (str); return str; }

4.//Convert time to fixed format output

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/** * Converts the time to a fixed format output * New Date (). Toformat (' Yyyy-mm-dd HH:mm:ss '); New Date (). Toformat (' Yyyy/mm/dd hh:mm:ss '); * Only support keywords (yyyy, MM, DD, hh, hh, MM, ss) HH: For 24 hours, HH said 12 hours/date.prototype.toformatstring=function (format) {var formatstr = format; if (format!= null && format!= "") {//Set year if (Formatstr.indexof ("yyyy") >=0) {formatstr = Formatstr.replace ("yy yy ", This.getfullyear ()); }//Set month if (Formatstr.indexof ("MM") >=0) {var month = This.getmonth () + 1; if (Month <) {month = "0" + month;} fo Rmatstr = Formatstr.replace ("MM", month); }//Set Date if (Formatstr.indexof ("DD") >=0) {var day = This.getday (); if (<) {days = "0" + daily;} formatstr = Form Atstr.replace ("DD", day); }//Set when -24 hours var hours = this.gethours (); if (Formatstr.indexof ("hh") >=0) {if (month <) {month = "0" + month;} formatstr = Formatstr.replace ("hh", hours); }//Set-12 hours if (Formatstr.indexof ("hh") >=0) {if (Hours >) {hours = hours-12;} if (Hours < ten) {hours = "0 "+ hours;} Formatstr = Formatstr.replace ("hh", hours); //Set the IF (Formatstr.indexof ("mm") >=0) {var minute = this.getminutes (); if (minute < ten) {minute = "0" + minute;} Formatstr = Formatstr.replace ("mm", minute); }//Set seconds if (Formatstr.indexof ("ss") >=0) {var second = This.getseconds (); if (second < ten) {second = "0" + second;} Formatstr = Formatstr.replace ("ss", second); } return FORMATSTR; }

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