var useLayerTransparency=true;var LayerTransparencySetting=new Array();var LayerTransparencyInitialized=false;var LayerTransparency_All_Opaque_Check=true;function setLayerTransparency(){var n=navigator;var ua=' '+navigator.userAgent.toLowerCase();var is_ie=ua.indexOf('msie')>0;var is_opera=ua.indexOf('opera')>0;if(!LayerTransparencyInitialized){initLayerTransparency();};if(!LayerTransparency_All_Opaque_Check){Background_Image_Counter=0;Number_OGC_Layers=SRC_Layer_URL.length;for(var i=0;i<Number_OGC_Layers;i++){if(SRC_Layer_URL[i]!=null){if(is_ie||is_opera){TempString2='document.BackgroundMap'+Background_Image_Counter+'.filters.alpha.opacity = '+(LayerTransparencySetting[Background_Image_Counter]*100)+';';eval(TempString2);}else{TempString2='document.BackgroundMap'+Background_Image_Counter+'.style.MozOpacity = '+LayerTransparencySetting[Background_Image_Counter]+';';eval(TempString2);};Background_Image_Counter++;}}}};function chgLayerTransparency(){if((useExternalWindow)||(!useTextFrame)){window.open("http://"+hostName+appDir+"setLayerTransparency.htm","Set_Layer_Transparency","width=425,height=300,scrollbars=yes,resizable=yes");}else{parent.TextFrame.document.location="http://"+hostName+appDir+"setLayerTransparency.htm";}};function initLayerTransparency(){Background_Image_Counter=0;Number_OGC_Layers=SRC_Layer_URL.length;for(var i=0;i<Number_OGC_Layers;i++){if(SRC_Layer_URL[i]!=null){LayerTransparencySetting[Background_Image_Counter]=1.0;Background_Image_Counter++;}};LayerTransparencyInitialized=true;};function getLayersTransparency(){Temp_String="";Background_Image_Counter=0;var CenterAdjust=Math.abs(eRight-eLeft);var CurrentMapScale=HaversineScale((eLeft+CenterAdjust),eBottom,(eLeft+CenterAdjust),eTop,mHeight,ScaleToolDPI);for(var i=Category_Order.length-1;i>=0;i--){if(Category_Layer_Order[i].length>0){TempArray=Category_Layer_Order[i].split(',');TempArray2=Category_Layer_Visibility[i].split(',');for(var j=TempArray.length-1;j>=0;j--){if(Check_Layer_Extent_and_Scale(TempArray[j],eLeft,eBottom,eRight,eTop,CurrentMapScale)){if(TempArray2[j]=='true'){var Temp_Keyword=-1;if(USGS_Group_Loaded){Temp_Keyword=IVM_Keyword_check(SRC_Layer_Name[TempArray[j]]);};if(Temp_Keyword>-1){Temp_String+='<option value="'+Background_Image_Counter+'">'+parent.MapFrame.IVM_Selected_Layer_SubSelect[Temp_Keyword]+'</option>';}else{Temp_String+='<option value="'+Background_Image_Counter+'">'+SRC_Layer_Name[TempArray[j]]+'</option>';}}};Background_Image_Counter++;}}};return Temp_String;};function modifyLayersTransparency(OpacityPercent,BackgroundLayer){LayerTransparency_All_Opaque_Check=false;LayerTransparencySetting[BackgroundLayer]=OpacityPercent/100;}