根据出生日期计算距离生日时间

具体使用根据情况大家自己调整,此处仅供参考。

------------------------------根据出生日期计算生日天数-----------------------------   
jxCore.BirthWarm = function(value, fieldCtl){    
    var Birth="";
    var ksRows="";
    var now = new Date();
    var tY=0;
    var tM=0;
    var tD=0;
    
        ksRows = fieldCtl.rowControl.rowData();        
        Birth = ksRows["出生日期"];
        if(value == null)
        {
            value = "暂缺出生日期";
            return value;
        }
        var dd = eval('new ' + Birth.substr(1, Birth.length - 2));
        var ar_date = [dd.getMonth() + 1,dd.getDate() ,dd.getFullYear()];
        
        tY =now.getFullYear();
        tM = now.getMonth()+1;
        tD = now.getDate();
        var params = new Array(tY,tM,tD,ar_date);
        var diffDay = jxCore.getdiffDay(params);
        value = diffDay;
        return value;
};
//此处供方法：jxCore.BirthWarm服务
jxCore.getdiffDay = function(params){

    var arry_nonleapyear = new Array(0,31,28,31,30,31,30,31,31,30,31,30,31);
    var arry_leapyear = new Array(0,31,29,31,30,31,30,31,31,30,31,30,31);
    var tY = params[0];
    var tM = params[1];
    var tD = params[2];
    var array  =params[3];
    var m = array[0];
    var d = array[1];
    var y = array[2];
    var diff_days1=0;
    var diff_days2=0;
    var sum=0;

//闰年生日天数计算
    if((tY % 4==0) && (tY % 100!=0) || ( tY % 400==0 ))
    {
      if(tM > m)
      {
            //计算当月剩余天数
            diff_days1=arry_leapyear[tM] - tD;
            //计算当生日月剩余天数
            diff_days2 = d;
            var up = 0;
            var down = 0;
            for(var i =1;i < m;i++)
            {
                up = up + arry_leapyear[i];
            }
            for(;tM < arry_leapyear.length;tM++)
            {
                down = down + arry_leapyear[tM+1];
            }
            sum = up + down + diff_days1 + diff_days2;
      }
      else
      {
            //计算当前月剩余天数
            diff_days1 = arry_leapyear[tM] - tD;
            //计算当生日月剩余天数
            diff_days2 = d;

        if(tM == m) //生日月等于当前月
        {
          if(tD > d)
          {
              sum = 366+d-tD;
          }
          else
          {
              sum = d-tD;
          }
        }
        else//生日月大于当前月
        {
          for( ;tM < m-1;tM++)
          {
              sum = sum + arry_leapyear[tM+1];
          }
          sum = sum + diff_days1 + diff_days2;
        }
      }
    return sum;
    }
//平年生日天数计算
    else
    {
      if(tM > m)//生日月小于当前月
      {
            //计算当月剩余天数
            diff_days1 = arry_nonleapyear[tM] - tD;
            //计算当生日月剩余天数
            diff_days2 = d;
            var up = 0;
            var down = 0;
            for(var i =1;i < m;i++)
            {
                up = up + arry_nonleapyear[i];
            }
            for(;tM < arry_nonleapyear.length;tM++)
            {
                down = down + arry_nonleapyear[tM+1];
            }
            sum = up + down + diff_days1 + diff_days2;
            
      }
      else
      {
            //计算当前月剩余天数
            diff_days1 = arry_nonleapyear[tM] - tD;
            //计算当生日月剩余天数
            diff_days2 = d;

        if(tM == m) //生日月等于当前月
        {
          if(tD > d)
          {
              sum = 365+d-tD;
          }
          else
          {
              sum = d-tD;
          }
        }
        else//生日月大于当前月
        {
          for( ;tM < m-1;tM++)
          {
              sum = sum + arry_nonleapyear[tM+1];
          }
          sum = sum + diff_days1 + diff_days2;
        }
      }
    return sum;
    }
};