(function($) {
/*
  主要针对ie下input输入框的问题
*/
  var placeholderfriend = {
    focus: function(s) {
      s = $(s).hide().prev().show().focus();
      var idvalue = s.attr("id");
      if (idvalue) {
        s.attr("id", idvalue.replace("placeholderfriend", ""));
      }
      var clsvalue = s.attr("class");
	  if (clsvalue) {
        s.attr("class", clsvalue.replace("placeholderfriend", ""));
      }
    }
  }

  //判断是否支持placeholder
  function isplaceholer() {
    var input = document.createelement('input');
    var textarea = document.createelement('textarea');
    return "placeholder" in input;
    return "placeholder" in textarea;
  }
  //不支持的代码
  if (!isplaceholer()) {
    $(function() {

      var form = $(this);
      var elements = form.find("input[type='text'][placeholder]");
      var elements1 = form.find("textarea[placeholder]");
      elements.each(function() {
        var s = $(this);
        var pvalue = s.attr("placeholder");
		var svalue = s.val();
        if (pvalue) {
          if (svalue == '') {
            s.val(pvalue).css({"color":"#a0a0a0","fontsize":"15px"});
          }
        }
      });
      elements1.each(function() {
        var s = $(this);
        var pvalue = s.attr("placeholder");
        var svalue = s.val();
        if (pvalue) {
          if (svalue == '') {
            s.val(pvalue).css({"color":"#a0a0a0","fontsize":"15px"});
          }
        }
      });

      elements.focus(function() {
        var s = $(this);
        var pvalue = s.attr("placeholder");
		var svalue = s.val();
        if (svalue && pvalue) {
          if (svalue == pvalue) {
            s.val('').css({"color":"#666","fontsize":"15px"});
          }
        }
      });
      elements1.focus(function() {
        var s = $(this);
        var pvalue = s.attr("placeholder");
        var svalue = s.val();
        if (svalue && pvalue) {
          if (svalue == pvalue) {
            s.val('').css({"color":"#666","fontsize":"15px"});
          }
        }
      });

      elements.blur(function() {
        var s = $(this);
        var pvalue = s.attr("placeholder");
		var svalue = s.val();
        if (!svalue) {
          s.val(pvalue).css({"color":"#a0a0a0","fontsize":"15px"});
        }
      });
      elements1.blur(function() {
        var s = $(this);
        var pvalue = s.attr("placeholder");
        var svalue = s.val();
        if (!svalue) {
          s.val(pvalue).css({"color":"#a0a0a0","fontsize":"15px"});
        }
      });

      var elementspass = form.find("input[type='password'][placeholder]");
      elementspass.each(function(i) {
        var s = $(this);
        var pvalue = s.attr("placeholder");
		var svalue = s.val();
        if (pvalue) {
          if (svalue == '') {
            s.css({"color":"#999","fontsize":"15px"});
            var html = this.outerhtml || "";
            html = html.replace(/\s*type=(['"])?password\1/gi, " type=text placeholderfriend").replace(/\s*(?:value|on[a-z]+|name)(=(['"])?\s*\1)?/gi, " ").replace(/\s*placeholderfriend/, " placeholderfriend value='" + pvalue + "' " + "onfocus='placeholderfriendfocus(this);' ");
            var idvalue = s.attr("id");
            if (idvalue) {
              s.attr("id", idvalue + "placeholderfriend");
            }
            var clsvalue = s.attr("class");
			if (clsvalue) {
              s.attr("class", clsvalue + "placeholderfriend");
            }
            s.hide();
            s.after(html);
          }
        }
      });

      elementspass.blur(function() {
        var s = $(this);
        var svalue = s.val();
        if (svalue == '') {
          var idvalue = s.attr("id");
          if (idvalue) {
            s.attr("id", idvalue + "placeholderfriend");
          }
          var clsvalue = s.attr("class");
		  if (clsvalue) {
            s.attr("class", clsvalue + "placeholderfriend");
          }
          s.hide().next().show();
        }
      });

    });
  }
  window.placeholderfriendfocus = placeholderfriend.focus;
})(jquery);