JavaScript common methods to share _javascript skills

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

JS Code

function Getpara (para) {  
  if (location.href.indexOf ("?") = = 1) {  
   //without arguments, then do nothing.  
   return null;  
  }  
  else{  
   //Get request string  
   var urlquery = Location.href.split ("?").  
   if (Urlquery[1].indexof ("&") ==-1) {///Only one parameter  
    if (urlquery[1].indexof ("=") = = 1) {  
     //no equals 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{  
    //parse 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

JS Code

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

JS Code

function Righttrim (str) {  
  if (str.length-1 >= 0 && str.charat (str.length-1) = "") {  
    str = STR.SL Ice (0, str.length-1);  
    str = Righttrim (str);  
  }  
   
  return str;  
} 

4.//Convert time to fixed format output

JS Code

/** * Converts 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 = f  
    Ormatstr.replace ("yyyy", this.getfullyear ());  
      }//Set the month if (Formatstr.indexof ("MM") >=0) {var month = This.getmonth () + 1;  
      if (Month <) {month = "0" + month;  
    } FORMATSTR = Formatstr.replace ("MM", month);  
      //Set Daily if (Formatstr.indexof ("DD") >=0) {var day = This.getday ();  
      if (Day < ten) {day = ' 0 ' + day;  
    } FORMATSTR = Formatstr.replace ("dd", day);  
    }//Set-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 <) {hours = "0" + hours;  
    } FORMATSTR = Formatstr.replace ("hh", hours);  
      //Set the split if (Formatstr.indexof ("mm") >=0) {var minute = this.getminutes ();  
      if (minute <) {minute = "0" + minute;  
    } FORMATSTR = Formatstr.replace ("mm", minute);  
      }//Set the second if (Formatstr.indexof ("ss") >=0) {var second = this.getseconds ();  
      if (second <) {second = "0" + second;  
    } FORMATSTR = Formatstr.replace ("ss", second);  
} return FORMATSTR;  }

The above is the entire contents of this article, I hope you can enjoy.