diff --git a/htdocs/js/lib/custom/models/dataservice.js b/htdocs/js/lib/custom/models/dataservice.js
index e7443602..3055af00 100644
--- a/htdocs/js/lib/custom/models/dataservice.js
+++ b/htdocs/js/lib/custom/models/dataservice.js
@@ -168,6 +168,8 @@ westdc.dataservice.wsn = {
 			this.selects = "";
 			
 			this.uls = new Array();
+			this.count = 0;
+			this.first = 0;
 			for(i in data.data)
 			{
 				this.input = new Array();
@@ -185,12 +187,32 @@ westdc.dataservice.wsn = {
 							 + '<input class="wsnctl-timeend" type="text" name="site['+i+'][endtime]" value="' + data.data[i].endtime + '" />'
 							 + '</div>';
 				this.uls.push('<div class="wsnctl" rel="'+i+'" style="float:left"><h4>观测点:'+data.data[i].name+'</h4>可下载的变量: '+ this.input.join("") + this.timemap + '<hr /></div>');
+				
+				this.count++;
+				if(this.count == 1)
+				{
+					this.first = i;
+				}
+				
 			}
 			
 			this.selects = this.uls.join("");
 			
+			if(this.count > 1)
+			{
+				this.allcontrol = '<div class="wsnctl">'
+							 + '<div class="wsnctl-time"><div>为所有数据选择时间范围(如果某些数据的时间超出范围请单独再次修改):</div> '
+							 + '<input class="wsnctl-all-timestart" type="text" value="' + data.data[this.first].starttime + '" /> - '
+							 + '<input class="wsnctl-all-timeend" type="text" value="' + data.data[this.first].endtime + '" />'
+							 + '</div></div><hr />';
+			}else{
+				this.allcontrol = "";
+			}
+			
 			this.HTML  = '<div class=""><div class="modal-header"><h3>'+data.info.service_title+'</h3></div>' 
-				  + '<div class="modal-body"><form id="dataservice-wsn-form">'
+				  + '<div class="modal-body">'
+				  + this.allcontrol
+				  + '<form id="dataservice-wsn-form">'
 				  + '<div>'
 				  + this.selects
 				  + '</div>'
@@ -209,14 +231,17 @@ westdc.dataservice.wsn = {
 				siteid = $(this).attr('rel');
 				timestart = $(this).children('.wsnctl-time').children('.wsnctl-timestart');
 				timeend = $(this).children('.wsnctl-time').children('.wsnctl-timeend');
-				year_start=(timestart).val().substr(0,4);
-				month_start=parseInt((timestart).val().substr(5,2))-1;
-				day_start=parseInt((timestart).val().substr(8,2));
-				year_end=(timeend.val()).substr(0,4);
-				month_end=parseInt((timeend.val()).substr(5,2))-1;
-				day_end=parseInt((timeend.val()).substr(8,2))
-				timestart.datepicker({ minDate: new Date(year_start, month_start, day_start), maxDate: new Date(year_end, month_end, day_end) });
-				timeend.datepicker({ minDate: new Date(year_start, month_start, day_start), maxDate: new Date(year_end, month_end, day_end) });
+				if(timestart.length && timeend.length)
+				{
+					year_start=(timestart).val().substr(0,4);
+					month_start=parseInt((timestart).val().substr(5,2))-1;
+					day_start=parseInt((timestart).val().substr(8,2));
+					year_end=(timeend.val()).substr(0,4);
+					month_end=parseInt((timeend.val()).substr(5,2))-1;
+					day_end=parseInt((timeend.val()).substr(8,2));
+					timestart.datepicker({ minDate: new Date(year_start, month_start, day_start), maxDate: new Date(year_end, month_end, day_end) });
+					timeend.datepicker({ minDate: new Date(year_start, month_start, day_start), maxDate: new Date(year_end, month_end, day_end) });
+				}
 				$(this).find('.wsnctl-select-all').click(function(e) {
                     if($(this).attr('checked') == 'checked')
 					{
@@ -225,6 +250,28 @@ westdc.dataservice.wsn = {
 						$(this).parent('label').parent('div').find('.wsnctl-select').removeAttr('disabled');
 					}
                 });
+				alltimestart = $(this).children('.wsnctl-time').children('.wsnctl-all-timestart');
+				alltimeend = $(this).children('.wsnctl-time').children('.wsnctl-all-timeend');
+				if(alltimestart.length)
+				{
+					alltimestart.datepicker({});
+					alltimestart.change(function(e) {
+						val = $(this).val();
+						$('.wsnctl').each(function(index, element) {
+							$(this).children('.wsnctl-time').children('.wsnctl-timestart').val(val);
+						});
+					});
+				}
+				if(alltimeend.length)
+				{
+					alltimeend.datepicker({});
+					alltimeend.change(function(e) {
+						val = $(this).val();
+						$('.wsnctl').each(function(index, element) {
+							$(this).children('.wsnctl-time').children('.wsnctl-timeend').val(val);
+						});
+					});
+				}
             });
 		}
 	}